Crohn's disease Activity: Abdominal Computed Tomography Histopathology Correlation

Area of Science:

• Gastroenterology
• Radiology
• Medical Imaging

Background:

• Crohn's disease (CD) affects millions globally, with therapy stratification relying on invasive endoscopic biopsies and clinical assessments.
• Cross-sectional imaging offers potential for non-invasive, image-based biomarkers to evaluate CD inflammatory activity.

Purpose of the Study:

• To investigate the predictive value of Computed Tomography (CT)-based morphologic patterns for assessing inflammatory activity in Crohn's disease.

Main Methods:

• Retrospective analysis of abdominal CT scans from 42 Crohn's disease patients (13 male, 29 female, median age 32).
• CT imaging protocol optimized for structural bowel alterations, with independent review by three radiologists focusing on specific findings.
• Histological analysis of endoscopic biopsies determined the extent of bowel wall inflammatory activity.

Main Results:

• CT findings such as increased bowel wall thickness (6.0 mm vs. 3.5 mm), mesenteric abscesses (32% vs. 0%), and mesenteric adenopathy (94% vs. 45%) were more prevalent in patients with high inflammatory activity.
• Significant correlations were found between histological inflammatory activity and bowel wall thickness (r=0.40), mesenteric adenopathy (r=0.54), mesenteric abscess (r=0.33), and mesenteric fat stranding (r=0.33).

Conclusions:

• CT-derived biomarkers, including wall thickness, mesenteric fat stranding, lymphadenopathy, and abscesses, correlate with histological inflammatory activity in Crohn's disease.
• These CT findings provide valuable, non-invasive information for therapy stratification in symptomatic CD patients, complementing endoscopic evaluations.